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Alaska sports week in review: East football tops West in playoffs; West tennis takes state; star seniors sweep weekly awards for UAA volleyball

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Alaska sports week in review: East football tops West in playoffs; West tennis takes state; star seniors sweep weekly awards for UAA volleyball


This previous week featured a plethora of normal and postseason motion at each the prep and collegiate degree throughout the Alaska sports activities panorama. Within the opening spherical of the Division I highschool soccer playoffs, Bettye Davis East put the clamps on West to advance, Bartlett gained a high-scoring affair with Dimond, and the Division II and III semifinals performed out as anticipated. The Colony Excessive volleyball staff surprised top-ranked Dimond and the College of Alaska Anchorage volleyball staff stayed sizzling because of its dynamic upperclassmen duo. Additionally, the prep tennis and cross-country seasons come to a detailed with state tournaments.

Headlines and highlights

The highschool soccer playoffs obtained underway this previous weekend and whereas virtually all the upper seeds that hosted a recreation got here away victorious, East made certain that it wasn’t a clear sweep with its 21-14 win over crosstown rival West in a CIC matchup on Friday night time. Led by a tenacious defensive effort, the Thunderbirds shut out the Eagles within the second half and scored all of the factors they wanted to prevail within the first half. They avenged a 21-6 dwelling loss earlier within the season by returning the favor on the street.

[East shuts out West in second half to punch ticket to semifinals of Division I football playoffs]

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Whereas nonetheless successful by double figures, Bartlett’s 55-35 win over Dimond was removed from commanding in a CIC showdown earlier in the identical day. The Golden Bears solely led 14-7 at halftime, earlier than an offensive onslaught from each groups unfolded within the second half. Neither protection appeared to have any reply for the opposite’s prime offensive weapon. Neither Niko Alailefaleula of Bartlett or Malachi Casey of Dimond might be stopped all recreation lengthy.

“We’re very bodily and never simply because we’re large,” Bartlett coach and 2022 CIC Coach of the 12 months Probability Matsuoka mentioned. “We’re very robust and we’re in form. We will maintain pounding the ball and blocking and operating exhausting all 4 quarters. That’s exhausting for lots of groups to deal with.”

Alailefaleula ran for 331 yards and scored 4 touchdowns on the bottom. Within the fourth quarter alone, he had scoring runs of 74 and 71 yards that primarily put the sport out of attain for the Lynx. The primary-team, all-conference operating again and linebacker additionally had a 60-yard landing known as again by penalty however he was nonetheless credited with a 48-yard achieve. He gave the overwhelming majority of the credit score to his road-grading offensive line.

“O-line did all the things for me being profitable, getting me to the second degree, and I hit the burners,” Alailefaleula mentioned. “I wouldn’t get the yards with out them and we wouldn’t get the win with out them.”

Casey tormented the Golden Bears’ secondary for a lot of the recreation as he and fellow senior Tyler Reese linked for 3 touchdowns, all of which went for over 20 yards. The all-conference quarterback-and-wide receiver connection stored Dimond inside putting distance via the primary three quarters. Reese accomplished 21 passes for 365 yards and 5 touchdowns and Casey caught 9 of these passes for 195 receiving yards. Senior broad receiver Vance Harris additionally had a standout efficiency with seven receptions for 120 receiving yards and a pair of 20-plus-yard touchdowns.

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The soccer staff wasn’t the one varsity program from Dimond to expertise the bitter style of defeat up to now week. The Lynx’s top-ranked volleyball staff suffered its first loss to an Alaska opponent final Monday on the street when Colony upset them in 4 units 3-1. It marked the primary non-tournament assembly between the 2 groups this season and the senior-heavy Knights’ roster got here away with an enormous confidence-building assertion win. Tatum Shelton and Taylee Weiss tied for the staff lead in digs with 19 and Weiss recorded a double-double by main the staff with 17 kills.

“I believe it’s confidence enhance,” Colony coach Steve Reynolds mentioned. “You get that have and say ‘Hey we are able to do that, we are able to beat this staff’ at time within the season.”

Whereas the Dimond soccer staff had its season come to an finish, its flag soccer staff superior to the semifinal spherical of the CIC regional playoffs with a 34-0 shutout of Eagle River. The Lynx had 4 gamers rating touchdowns on offense, led by junior Mai Mateaki, who ran in a seven-yard rating and caught one other from 10 yards out.

It wasn’t all unhealthy for West Excessive sports activities this previous weekend as its tennis program claimed its tenth state title and fourth in a row. The Eagles had been highlighted by their state title-winning girls and boys doubles groups and state runner-up combined doubles staff however had been propelled by their super depth.

[West claims 10th Alaska high school state tennis championship in another landslide]

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The Eagles have had three totally different pairings win every of the final three ladies doubles state titles with one fixed being senior Eva Lief. The three-time champion has been one of many program’s stalwarts throughout her time at West.

october, high school sports, cross country, alaska school activities association, ASAA

Chugiak star senior distance runner Campbell Peterson accomplished her dominant closing cross-country season by main the Mustangs to a Division I state title within the ladies division. She cruised to a first-place end with a formidable mark of 19 minutes, 16 seconds, and the staff completed properly forward of the remainder of the sector with a complete rating of 42.

[Chugiak, Colony and Grace Christian among big winners at Alaska state cross-country championships]

On the faculty volleyball scene, UAA improved its total report to 19-1 and stayed an ideal 9-0 in convention play with a pair of overwhelming victories over Central Washington and Northwest Nazarene inside a 72-hour interval. Main the cost had been the standard suspects in star seniors Eve Stephens and Ellen Floyd, who earned weekly convention honors for his or her play within the two matches. Stephens prolonged her convention report of weekly awards to 12 along with her fifth of the season and first of the defensive selection. Floyd was named the GNAC Offensive Participant of the Week, which marked her first of the season and fourth of her profession.

The UAA hockey staff obtained swept by Colorado School in a two-game street collection. The Seawolves misplaced 6-2 on Friday and 4-1 Saturday. Connor Marritt, Brett Bamber and Maximilion Helgeson tallied targets for the Seawolves on the street journey.

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The Anchorage Wolverines bounced again from getting swept by the Minnesota Wilderness final week in a three-game street collection by sweeping the in-state rival Fairbanks Ice Canines in a two-game street collection this previous weekend. They gained 6-2 on Friday and 4-2 on Saturday.

Final Week’s Outcomes

Prep Soccer

Friday

Bartlett 55, Dimond 35

East 21, West 14

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Colony 51, Service 34

Houston 40, Barrow 0

Soldotna 34, North Pole 20

Saturday

Juneau 52, South 21

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Lathrop 35, Chugiak 0

Homer 54, Nikiski 20

Flag Soccer

Thursday

South 38, Chugiak 0

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Dimond 34, Eagle River 0

Service 16, Bartlett 0

West 7, East 0

Swimming

Friday

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Twin meet

West v Dimond

Boys: Dimond 119, West 57

Ladies: Dimond 124, West 52

South v Service

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Boys: South 135, Service 48

Ladies: Dimond 130, Service 54

Prep Volleyball

Monday

Colony 3, Dimond 1 (25-20, 13-25, 25-21, 26-24)

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Thursday

Chugiak 3, Bartlett 1 (16-25, 25-21, 25-13, 25-17)

Dimond 3, South 0 (25-13, 25-13, 25-16)

Friday

Service 3, Eagle River 0 (25-20, 27-25, 25-11)

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Saturday

Dimond 3, Service 0 (25-12, 28-26, 25-16)

Riflery

South 7, West 0

Service 5, Dimond 2

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Prep tennis

State Event

Ladies singles

(Double elimination format with elimination units going to 4 video games as a substitute of 6)

Play-in

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Siekmann, West Valley, def. Littlechief, Colony, 3-6, 7-5, 13-11

First spherical

Al. Pedalino, Service, def. Peace, Wasilla, 6-0, 6-0

Az. Pedalino, Service, def. Inexperienced, West, 6-1, 6-3

White, Monroe Catholic, def. Pikul, Juneau-Douglas, 6-1, 2-6, 10-3

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Yu, West, def. Siekmann, 6-0, 6-1

Second spherical

Al. Pedalino def. Az. Pedalino, 6-2, 6-3

White def. Yu, 3-6, 6-2, 11-9

Third spherical

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Al. Pedalino def. White 6-1, 6-2

Loser-out

Littlechief def. Peace 4-2, 4-1

Littlechief def. Inexperienced 1-4, 4-1, 10-8

Pikul def. Siekmann, 4-2, 4-1

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Pikul def. Aż. Pedalino 5-3, 5-4

Yu def. Littlechief 4-1, 4-1

Pikul def. Yu 4-0, 4-1

Pikul def. White 4-0, 4-0

Finals

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Pikul def. Al. Pedalino 7-5, 3-2 (retired)

Pikul def. Al. Pedalino 4-0, 4-1

Boys singles

(Double elimination)

Play-in

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Siekmann, West Valley, def. Christianson, Colony, 6-1, 6-0

First spherical

Escobar, Service, def. Crawford, Colony, 6-0, 6-0

Welch, Juneau-Douglas, def. Ilgenfritz, West Valley, 6-0, 6-0

Griffin, South, def. Brooks, Dimond, 6-2, 6-3

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Cerbian, West, def. Siekmann, 6-4, 6-3

Second spherical

Escobar def. Welch, 6-2, 6-1

Griffin def. Cerbian, 6-4, 6-2

Third spherical

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Griffin def. Escobar, 6-3, 3-6, 16-14

Loser-out

Crawford def. Christianson, 4-0, 4-1

Crawford def. Ilgenfritz 4-2, 2-4, 10-8

Cebrian def. Crawford 4-2, 4-0

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Siekmann def. Brooks, 4-1, 4-0

Siekmann def. Welch, 4-0, 4-2

Siekmann def. Cebrian 4-0, 0-4, 10-6

Escobar def. Siekmann, 4-1, 4-0

Finals

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Escobar def. Griffin 6-1, 6-3

Griffin def. Escobar, 1-4, 5-3, 10-7

Ladies doubles

(Double elimination)

Play-in

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Hollcraft/Dahle, Lathrop, def. Pettit/Baker, Palmer, 6-1, 6-2

First spherical

Spils/Fagerstrom, Dimond, def. Scanlon/Anderson, Lathrop, 6-0, 6-0

Bixby/Ligsay, Juneau-Douglas, def. Payne/Loggins, Colony, 6-1, 6-3

Lief/Yang, West, def. Hanna/Moffett, Chugiak, 6-0, 6-0

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Hollcraft/Dahle def. Li/O’Leary, West, 6-1, 6-3

Second spherical

Spils/Fagerstrom def. Bixby/Ligsay, 6-0, 6-1

Lief/Yang def. Hollcraft/Dahle, 5-7, 6-1, 10-6

Third spherical

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Lief/Yang def. Spils/Fagerstrom, 6-4, 6-1

Loser-out

Scanlon/Anderson def. Pettit/Baker, 5-4, 4-0

Scanlon/Anderson def. Payne/Loggins, 5-3, 4-1

Hollcraft/Dahle def. Scanlon/Anderson, 4-2, 4-0

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Li/O’Leary def. Hanna/Moffett, 4-1, 5-3

Li/O’Leary def. Bixby/Ligsay, 4-1, 2-4, 10-7

Hollcraft/Dahle def. Li/O’Leary, 4-2, 4-1

Spils/Fagerstrom def. Hollcraft/Dahle, 2-4, 4-1, 10-8

Finals

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Spils/Fagerstrom def. Lief/Yang, 7-5, 6-4

Lief/Yang def. Spils/Fagerstrom, 4-2, 4-1

Boys doubles

(Double elimination)

Play-in

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Zimmer/Flynn, West, def. Hoyt/Mobley, Wasilla, 6-3, 6-4

First spherical

Clendaniel/Cebrian, West, def. Buss/Kohlhase, Juneau-Douglas, 6-0, 6-1

Ulman/Bailey, South, def. Whitney/Motton, Colony, 3-6, 6-0, 10-7

Reinheller/Reinheller, West Valley, def. Lafond/Kim, Lathrop, 6-3, 6-3

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Teasley/Yoon, Dimond, def. Zimmer/Flynn, 6-2, 6-0

Second spherical

Clendaniel/Cebrian def. Ulman/Bailey, 6-2, 6-3

Teasley/Yoon def. Reinheller/Reinheller, 3-6, 6-4, 10-7

Third spherical

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Clendaniel/Cebrian def. Teasley/Yoon, 6-2, 7-6

Loser-out

Hoyt/Mobley def. Buss/Kohlhase, 5-3, 1-4, 10-8

Whitney/Motton def. Hoyt/Mobley, 4-2, 4-0

Reinheller/Reinheller def. Whitney/Motton, 5-3, 4-0

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Zimmer/Flynn, def. Lafond/Kim, 0-4, 5-3, 10-8

Zimmer/Flynn def. Ulman/Bailey, 1-4, 5-3, 10-6

Reinheller/Reinheller def. Zimmer/Flynn, 4-2, 4-1

Teasley/Yoon def. Reinheller/Reinheller, 4-5, 4-2, 10-6

Finals

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Clendaniel/Cebrian def. Teasley/Yoon, 6-2, 6-4

Blended doubles

(Double elimination)

Play-in

Macasland/Slama, Eagle River, def. Toche/Caldentey, Palmer, 6-1, 6-0

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First spherical

Jameson/Skaaren, South, def. Hilling/Beardsley, Lathrop, 6-0, 6-0

Jung/Batac, Dimond, def. Matteson/Jones, Ben Eielson, 6-0, 6-2

Smith/Sedwick, West, def. Cox/Breshears, Wasilla, 6-1, 6-1

Dale/West, Juneau-Douglas, def. Macasland/Slama, 6-1, 6-0

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Second spherical

Jameson/Skaaren def. Jung/Batac 6-0, 6-0

Smith/Sedwick def. Dale/West, 6-4, 4-6, 11-9

Third spherical

Jameson/Skaaren def. Smith/Sedwick 6-3, 7-6

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Loser-out

Hilling/Beardsley def. Toche/Caldentey, 4-1, 4-1

Matteson/Jones def. Hilling/Beardsley, 2-4, 4-2, 10-5

Dale/West def. Matteson/Jones, 4-0, 4-0

Macasland/Slama def. Cox/Breshears, 4-0, 4-0

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Jung/Batac def. Macasland/Slama, 1-4, 4-2, 10-6

Dale/West def. Jung/Batac, 2-4, 4-2, 10-2

Smith/Sedwick def. Dale/West, 4-0, 4-2

Finals

Jameson/Skaaren def. Smith/Sedwick, 7-6, 6-4

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School

Volleyball

Thursday

UAA 3, CWU 0 (25-20, 25-10, 25-16)

Saturday

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UAA 3, Northwest Nazarene 1 (25-20, 23-25, 25-14, 25-21)

Hockey

Friday

Colorado School 6, UAA 2

Saturday

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Colorado School 4, UAA 1

NAHL

Friday

Anchorage Wolverines 6, Fairbanks Ice Canines 2

Saturday

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Anchorage Wolverines 4, Fairbanks Ice Canines 2

Three issues to look at for this week

Prep soccer

Colony at Bartlett, 3 p.m. Saturday

Whereas East takes on top-ranked Juneau within the state capital, the Golden Bears will host the Knights on the similar time on the town for the second time this season. The final time these two groups performed got here in Week 6 of the common season and Bartlett handed Colony a humbling 46-7 loss. Since then, the Knights have gained every of their final three video games by almost 20 factors, together with back-to-back blowouts over Service to shut the common season and within the quarterfinals of the Division I playoffs. Two of the state’s greatest gamers will see loads of one another on this recreation. Offensive Participant of the 12 months Niko Alailefaleula of Bartlett and Defensive Participant of the 12 months Jack Nash of Colony play each methods for his or her respective groups.

Division II and III state championship video games, midday and 4:30 p.m. Saturday

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A pair of title video games will happen simply earlier than and proper after that matchup at Service Excessive College when Lathrop and Soldotna play one another at midday and Houston will tackle Homer later that night at 4:30 p.m. Whereas the Hawks and Mariners have already performed this season and can achieve this once more to determine who takes dwelling the Division III championship, the Malamutes and Stars have been on a collision course to satisfy within the Division II championship. This may mark the groups’ third straight assembly within the state title recreation, excluding the 2020 season when their was no state playoffs because of the COVID-19 pandemic.

School volleyball

Seattle Pacific at UAA, 7 p.m. Thursday

The Sewolves can be returning dwelling following a three-matchup street journey and can be seeking to lengthen their spectacular successful streak from 11 to an excellent dozen once they host the Falcons on the Alaska Airways Middle. These two Nice Northwest Athletic Convention groups confronted one another as soon as already this season in a tightly contested match that went all the way down to the wire and UAA got here out on prime 3-2 on Sept. 17. Two days later, the Seawolves will host one other GNAC opponent in Montana State Billings on the similar time and place.





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Alaska

Anchorage, Alaska hit by hurricane-force winds, structures damaged across city

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Anchorage, Alaska hit by hurricane-force winds, structures damaged across city


Associated Press

Hurricane-force winds cause widespread damage in Alaska’s largest city

Thousands of residents across Alaska’s largest city were still without power Monday, a day after a powerful storm brought hurricane-force winds that downed power lines, damaged trees, forced more than a dozen planes to divert, and caused a pedestrian bridge over a highway to partially collapse. A 132-mph (212-kph) wind gust was recorded at a mountain weather station south of Anchorage. A large low-pressure system in the Bering Sea brought the high winds, moisture and warmer than average temperatures — in the low 40s Fahrenheit (slightly over 4.4 degrees Celsius) — to Anchorage on Sunday, said National Weather Service meteorologist Tracen Knopp.



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Thousands without power in Alaska after hurricane-force winds hit

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Thousands without power in Alaska after hurricane-force winds hit


Thousands of residents in Anchorage, Alaska, faced widespread devastation and power outages Monday after hurricane-strength winds battered the city on Sunday.

Why It Matters

This latest incident comes as power outages across the United States have become a growing concern as extreme weather events increase in frequency and intensity, often leaving millions of Americans in precarious situations. Hurricanes, wildfires, ice storms and heatwaves have caused widespread disruptions, highlighting the vulnerability of aging electrical grids to severe conditions.

Prolonged outages not only hinder daily life by cutting off access to heating, cooling and essential appliances but also pose significant risks to public health, particularly for the elderly and those with medical conditions reliant on powered devices.

What To Know

The Anchorage storm, which began Sunday, delivered gusts reaching 132 mph at a mountain weather station south of the city, according to the National Weather Service. Within Anchorage itself, winds hit 75 mph, toppling trees, scattering debris and partially collapsing a pedestrian bridge over the Seward Highway, the city’s main southern thoroughfare.

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At the height of the storm, 17,500 customers were without power, according to Julie Hasquet, spokesperson for Chugach Electric Association. As of Monday, roughly 5,700 homes remained offline with full restoration expected to stretch into Tuesday.

Dick Powell cuts a birch tree blocking Steeple Drive in South Anchorage during the windstorm on January 12, 2025. A powerful storm in Anchorage left thousands without power.

Bill Roth/Anchorage Daily News/ AP

The storm’s chaos wasn’t limited to neighborhoods. Anchorage’s airport, a vital hub for passenger and cargo traffic, saw significant disruptions. Winds forced 13 aircraft, including a U.S. Air Force plane, to divert to Fairbanks, which sits nearly 360 miles away.

On the ground, emergency crews scrambled to clear bridge debris, which had obstructed traffic on the highway. However, no injuries were reported when the side fencing and roof of the bridge fell onto the four-lane divided highway on Sunday. Traffic was rerouted and crews removed the debris.

Alaska Department of Transportation spokesperson Shannon McCarthy pointed to the winds as the probable cause of the bridge failure. However, structural engineers are investigating to determine the full extent of the damage.

Meanwhile, the storm marked a rare convergence of high winds, warmer-than-average temperatures and moisture from a low-pressure system in the Bering Sea, said National Weather Service meteorologist Tracen Knopp. Anchorage saw temperatures in the low 40s Fahrenheit, unusual for mid-winter.

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What People Are Saying

Alaska Department of Transportation spokesperson Shannon McCarthy said: “The winds were the leading cause, but our bridge engineers will be out there today and may be able give us a more comprehensive analysis of what happened.”

Julie Hasquet, a spokesperson for Chugach Electric Association, said some customers may not have power back on until Tuesday. She said: “When our crews show up for repairs, they don’t know what they’re going to find.”

Resident Steven Wood told Anchorage television station KTUU about how he and his family was watching the winds blow things around the yard Sunday morning when they saw their neighbor’s roof partially blow off and head right toward them.

“All of a sudden, I see the roof start to peel off, and all I can yell is, ‘Incoming! Everybody run!’” Wood said.

What Happens Next

Cleanup efforts are underway in Anchorage as the city begins recovering from the powerful storm.

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This article includes reporting from The Associated Press.



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Genetic diversity in Alaska’s red king crab may provide climate change resilience

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Genetic diversity in Alaska’s red king crab may provide climate change resilience


Red king crab on the deck of a research vessel. Credit: NOAA Fisheries / Erin Fedewa

New genetic research on the Alaska red king crab reveals previously undiscovered diversity among different regions, suggesting the species is more resilient to climate change and changing ocean conditions.

Maintaining genetic diversity within and among populations is vital to ensure species are resilient to challenging conditions. Without it, a single disease or set of conditions—such as a prolonged change in ocean acidification—could drive a species to extinction.

Fortunately, new research has revealed more genetic diversity across Alaska’s red king crab populations than originally documented. This suggests that the species will be more resilient in the face of changing conditions like ocean warming. However, any efforts to enhance red king crab populations need to be careful not to affect this genetic diversity.

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King crab in Alaska

Historically, the red king crab fishery was Alaska’s top shellfish fishery. It’s embedded in the culture of Alaska’s working waterfronts and king crabs have been the centerpiece of holiday feasts around the world. However, the red king crab fishery collapsed in the 1980s. Since 1983, most populations have been depressed statewide and the Gulf of Alaska fishery remains closed.

Wes Larson is co-author of the research published in Evolutionary Applications and the genetics program manager at the NOAA Alaska Fisheries Science Center. He reflects, “When it comes to understanding crab biomass declines and how to recover populations, we need to better understand population structure and local adaptation. There are a lot of concerned and invested fishermen, processors, and community members getting more engaged in these issues and it’s propelling new and innovative research.”

To dig into this need, Larson and a team of collaborators embarked on a study to generate whole genome sequencing data on red king crab in different locations across Alaska. The benefit of whole genome sequencing over previous methods is that it’s akin to reading the full story of an organism’s makeup instead of just a chapter or two. This holistic approach offers more robust analysis in order to tease apart similarities and differences between locations.

New genetics research in Alaska

Traditionally, information about commercially important species comes from fisheries-dependent data (collected on commercial fishing vessels) or independent surveys (from scientific research vessels). From these, we gather data on abundance, size, sex, reproductive status, diet, etc.

Genetics tools help to fill in the information gaps from traditional surveys, and can be used to:

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  • Define stock of origin
  • Assess local adaptation
  • Document genetic diversity and inbreeding

Whole genome sequencing builds on past methods by enhancing our ability to detect important differences between populations at finer scales.

Red king crab live in diverse environments—from coastal bays in the north, to open sea shelves in the Bering Sea. They also live in small bays and fjords fed by glacial melt in Southeast Alaska and the Gulf of Alaska. King crab in Alaska generally inhabit the following five regions:

  1. Southeast Alaska
  2. Gulf of Alaska
  3. Aleutian Islands
  4. Eastern Bering Sea
  5. Norton Sound / Chukchi Sea.

Previous genetic studies have hypothesized that king crab from these regions are split into three genetic groups:

  1. Southeast Alaska
  2. Gulf of Alaska / East Bering Sea
  3. Aleutian Islands / Norton Sound.

However, these studies used older genetic techniques, which may not provide the resolution necessary to accurately define genetic structure. The current study reinvestigated the genetic structure of the red king crab in all five regions using high-resolution data derived from whole genome sequencing.

Genetic diversity in Alaska red king crab may provide climate change resilience
Map of collection sites and years of collections colored by regions. Credit: NOAA Headquarters

The results of this study were revealing and informative. Scientists found substantial genetic structure within populations and genetic diversity between regions. In some cases, scientists observed this diversity between populations separated by only a few hundred kilometers.

“Crabs have pelagic larvae, so this is very surprising given the potential for ocean currents to distribute these larvae long distances,” said Larson. “However, these populations do not seem to be mixing and have become genetically isolated.”

Ultimately, the previous hypothesis of three genetic groupings was revised by this whole genome sequencing study. This updated method provided more clarity of fine-scale genetic differences than previous methods. The data indicate that there are six, possibly seven, genetically distinct populations:

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  1. Southeast Alaska
  2. Gulf of Alaska
  3. Aleutian Islands
  4. Bristol Bay
  5. Pribilof Islands
  6. Norton Sound / Chukchi Sea

Data showed previously unrecognized differences between the Gulf of Alaska and East Bering Sea regions. And the East Bering Sea region is split into separate Bristol Bay and Pribilof Islands populations.

Researchers also found that the Aleutian Islands and Norton Sound/Chukchi Sea regions are unique. Data suggests that Norton Sound and Chukchi Sea may be distinct as well. However, further research is required to determine if this is the case.

Scientists attribute this genetic diversity to a combination of factors including populations deriving from different glacial refugia. These are areas that remained ice-free during the lce Age. And more recently, natural selection (genetic changes driven by adaptation) and genetic drift (genetic changes that are random) likely contributed to this diversity. The research documented evidence of local adaptation in most populations.

Fisheries management implications

The scientists’ approach to sequence the whole genome of red king crabs was a more detailed method using orders of magnitude more data than previous studies.

It also confirmed that fisheries are being managed effectively by region in Alaska. For example, crab stocks in the Gulf of Alaska, Aleutian Islands, Bristol Bay, and Pribilofs Islands regions are each managed separately. Prior to this new research, the Bristol Bay and Pribilof Islands were not found to be genetically distinct. This new understanding reinforces that we should continue to manage them separately.

Understanding population structure, and these newly discovered genetic signals of local adaptation, is also important for preventing overfishing on genetically unique populations. And it’s critical to provide information on how local adaptations influence responses to different climatic conditions.

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We may find that some populations have the potential to fare better in future climate conditions that are likely as climate change progresses. Genetics can also reveal shifts in population distribution. Some shifts may already be underway in the Bering Sea as the North Pacific warms.

Finally, with the Gulf of Alaska population being depressed, scientists would expect a higher potential for inbreeding and lower genetic diversity. However, researchers found no evidence of reduced diversity, meaning genetic health did not suffer as the population declined. This foundation of genetic diversity means that genetic factors should not limit recovery.

This research also provides important data that can be used to inform broodstock selection for red king crab enhancement programs. Enhancement programs raise young crabs in hatcheries and release them into the wild to enhance the population.

Given the genetic diversity of red king crab across Alaska, it’s vital to prioritize local broodstock for enhancement before sourcing from elsewhere. This helps to keep genetic diversity intact and ensures that the genetic integrity of locally adapted populations is not jeopardized.

More information:
Carl A. St. John et al, Whole Genome Sequencing Reveals Substantial Genetic Structure and Evidence of Local Adaptation in Alaskan Red King Crab, Evolutionary Applications (2024). DOI: 10.1111/eva.70049

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Citation:
Genetic diversity in Alaska’s red king crab may provide climate change resilience (2025, January 13)
retrieved 13 January 2025
from https://phys.org/news/2025-01-genetic-diversity-alaska-red-king.html

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